Dust-collector for rock-drills.



2 SHEETS-SHEET 1A guna/w07, /Z'y/Zfyn Patented Feb. 16, 1915.

E. F. GALLIGAN.

DUST COLLECTOR FOB. ROCK DRILLS.

APYLIGATIN FILED DEU. a, 1913.

Witwe/Joao @f// THE NORRIS PETERS CO.. PHCTGLITHOI. WASHINGUN. D. C.

E. P. GALLIGAN.

DUST COLLECTOR FCR RCCK DRILLCS.

APPLICATION FILED DEG. 8, 1913. 1,128,675

Patented Feb. 16, 1915.

2 SHEETS-SHEET 2,

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UNITED STATES ramena* ormon.

EMMET F. GALLIGAN, OF IDAHO SPRINGS, COLORADO, ASSIGNOR OF ONE-HALF TO HENRY E. WOODVARD, OF DENVER, COLORADO, ANI) ONE-FOURTH TO WILLIAM GALLIG-AN, OF IDAHO SPRINGS, COLORADO.

DUST-COLLECTOR FOR ROCK-DRILLS.

Application led December 8, 1913.

To all whom t may concern.'

Be it known that I, EMMET F. GALLIGAN, a citizen of the United States, residing at Idaho Springs, county of Clear Creek, and State of Colorado, have invented certain new and useful Improvements in DustvCollectors for Rock-Drills; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specification.

My invention relates to improvements in dust collectors for rock drills, my object being to provide an efficient device of this character for collecting the dust ordinarily resultingr from the escape of the rock cuttings from the drill hole. This dust, when allowed to permeate the atmosphere, is exceedingly injurious to workmen in the vicinity.

Hence, the object of my present invention is to overcome this difiiculty.

In many of its features, this invention is similar to my previous application, Serial No. 772,298, filed June 7, 1913, for improvements in dust-collectors for rock drills. However, in my present construction, the manner of connecting the housing with the drill steel is greatly simplified as compared with the construction described in my aforesaid application. In my present invention, the lower portion of the housing or the short leg thereof through which the drill steel passes is equipped with a heavy piece of felt or other similar or suitable material, the same being sewed or otherwise secured therein. This felt packing is open to receive the drill steel and is secured in close contact with the steel by means of a flexible, preferably elastic band, applied to the outside ofthe short leg of the housing as hereinafter more fully explained.

Other novel features will be fully understood as this specification prcoeeds.

In the drawing: Figure 1 vis an elevation of my improved dust collector supported in place and shown in connection with a rock drill. Fig. 2 is an enlarged view of the same, the drill however being broken away with the exception of a portion of the drill Specification of Letters Patent.

Patented Feb. 16, 1915.

Serial No. 805,286.

drill steel being shown in place, and partly broken away. Fig. 5 is a section taken on the line 5 5, Fig. 4, shown on a larger scale. In this view, the felt packing is shown tightly secured to the drill steel by the use of the securing band. Fig. 6 is a similar view of the same construction, showing the band. extended, the felt packing in this case being slightly separated from the drill steel.

The same reference characters indicate the same parts in all the views.

Let the numeral 5 designate a housing, preferably composed of canvas, its outer extremity being doubled upon itself as shown at 6, for reinforcing purposes. To the outer` portion of the housing, a number of loops 7 are secured, the said loops extending below a felt band 8 which extends entirely around the outer extremity of the housing, and is adapted to fit the breast of the rock 9 when the device is in use. Surrounding the reinforced portion of the housing is a spiral spring 10 whose uppermost convolution is threaded through the loops 7 and afterward connected with the spring as shown at 12 or at a point where its second convolution may be said to commence, this connection being made by means of a hook 13 formed in the free extremity of the spring. In the lowermost convolution of the spring, eyes 11 are formed which engage inwardly projecting pins 15 mounted on'the arms 16 of the forked upper extremity 17 of a rod 18 which telescopes in a lower supporting bar 19, the rod 18 being connected with the bar by means of a set bolt 20, whereby the parts are lengthwise adjustable as it will be readily understood. rIhe lower extremity of the bar 14 is pointed as shown at 21 and engages the bottom of the tunnel or other surface where the construction is employed. The rod 17 is bent as shown at 22, whereby while the body of the supporting structure is located beyond the housing its forked extremity extends on opposite sides thereof, and is connected with the spring l0 as heretofore explained. The rod 18 is so adjust-l is 'provided with va short leg 23, 'in' which is secured by means of sewing or in any other suitable manner, a bushing 24: of felt or other suitablesirnilar material, the said bushing being relatively heavy. Normally, this `bushing is open to receive the drill steel which passes freely therethrough as illustrated in Fig. I6. To the 'outside of the leg`23 of the canvas housing, two loops 26 and 27 are secured. With' the loop 27 is connected a hook 28, and with the loop 26 a rubber 'band 29, the `said band being double and connected with the loop '26, by passing av 'double end of the band through the loop and ra doubleend of the latter through the two parts thereof, a holding piece 30 be- 25-ing rst connected with the rubber band by looping the latter through a ring'l in a '5 manner 'that will be readily understood from an inspection ofthe drawing. Assuming that the construction is as illustratedl in Fig. 6, it will only be necessary to wrap the rubber band around `the short leg 'o'f 'thel housing on the `outside in such a manner as to press the felt bushing tightly inwardly against the drill steel, after which the ring 3l is connected with the hook 28 as illustrated in Fig. 5. By virtue of this simple connection, the short leg of the housing throughwhich the drill steel passes, ips-made sufhcientlygtight around the steel, whichat the same time is free to work therethrough and perform the rock cutting function with the same e'fliciently as if the dust collector were not applied.

To the longer leg 32 of thel housing 5, a conduit 33 is'` connected, which'i's of suilicient length to extend tothe bottom of the drift or tunnel, or to Iany other suitable p'oint, the arrangement being such that the rock cuttings are carried 'e downwardly through the said conduit and 'quietly de positedwhere ever desired, thus preventing of the atmosphere by the dust asfheretofore explained. l y j As illustrated in the drawing, the conduit 33 is equipped with hoolrs 34, which are connected with rings 35 Ymade fast to the housing by nieansjof 1oop$36. t .f

From "the foregoing description, use

and voperation ofmy `improvem'er'it will be breast of the rock.v Thefdr'ill steel is then inserted through the Vfelt bushing 24, after which the vshort leg 'ofthe housing 4is wrappedv on the outside 'to press the' felt ner heretofore explained. The drilling 7o tightly vagainst the drill steel in the manoperation may then proceed and the rock i cuttings will *be 'caught and carried downwardly through the: conduit 33, in the manner heretofore explained.

Having 'thus 'described my invention,

what I'claim is: A dust collector for rock drills, including a housing adapted to surround the breast 'of the rock and doubled `back uponitself eiz'terior'ly for reinforcing purposes, an

exterior shoulder formed upon the housing and adaptedv to yengage the breast of the rock, the lsaid "shoulder comprising a band of relatively soft material, loops applied to the outerportionof the housing and eX- posed adjacent the said shoulder, a spiral spring surrounding the reinforced portion ofthe housing'and having its outermost con-V the free extremity 'of the spring kbeing detachably 'connected -after passing through' thel'oops, a standard having a forked portion adapted topass on oppositev sides of theV housing, the parts of the standard adjacent the .housing carrying pins which are operatively connected with the lowermost convolution of the spring, the standard being'extensibly adjustable for rfegulatingthe 90` A l volution threaded Vthroughthe said loops,

tensionof 'the spring, substantially as -described. D

4kI n'testimony whereof I aflX my signature in 'presence 'of' two witnesses. v

i f EMMET F.1GALLIGAN.

Y Witnesses: 1

y 'CHARLES D. AMES, GALLiGAN'.

Genies 'of this patent may be obtained for ve cents each, by addressing" the Commissioner Acf Patents, l, :gf

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